If you lose the ball at the release point, it doesn't fit right. Have your grip checked.

I'm doing some calculations about 16 vs. 15 pound equipment, and assuming you are able to put the same amount of energy into your release, the rev rate gain from doing to 15lbs from 16 is pretty negligible (about .3%). I think the biggest reason for moving to 15 is less fatigue, and increased deflection. When I threw 16, my stuff hit too hard. (I'll probably be looking into deflection more as well.)

This past summer, I was contemplating moving down to 15. I was talking it over with a guy who bowls in my summer league who is a Regional Pro. He said that since I don't have any problems throwing a 16lb ball, he sees no reason to make the switch. I brought up the extra revs people have seen by going to 15 and he told me that I didn't need it.

15 vs 16 is going to go on for a while. Moving down or up just to do so is silly. If you are getting too much deflection with a 15, then move to 16. If your arm is getting tired too quickly or you have other physical limitation, move to 15. Other than that, standing pat is the best thing to do.

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